Dust-collector



(No Model.) 2 Sheets-Sheet 1.

N. W. HOLT.

DUST GOLLEGTOR. N0. 1250,813. V Patented Dec. 13,1881;

. /w'z m a \YAWEEEEE. P NT Y yjqgmpb WM M (No Model.) 2 Sheets-Sheet 2.

;N. W. HOLT.

DUST GOLLEGT 0R. No. 250,813. Patented Dec. 13,1881.

WEESH I UNITED STATES PATENT OFFICE.

NOAH W. HOLT, OF CHICAGO, ILLINOIS, ASSIGNOR TO CHARLES R.KNICKERBOCKER, OF JACKSON, MICHIGAN.

DUST-COLLECTOR.

SPECIFICATION forming part of Letters Patent No. 250,813, dated December13, 1881.

Application filed April 16, 1880. (No model.)

To all whom it may concern.

Be it known that I, NOAH W. HOLT, of Chicago, State of Illinois, haveinvented certain new and useful Improvements in Dust-Collectors; and Ido hereby declare that the following is a full, clear, and exactdescription of the invention, reference being had to the accompanyingdrawings, and to the letters of reference marked thereon, which form apart of this specification.

This invention relates to dust-collectors for flooring-mills, and isintended as an improvement upon the devices shown in my now pendingapplication filed January 26, 1880. V

The invention consists, generally, in a dustcollecting reel having itsdust-collecting cloth mounted on separately movable sections or parts ofthe reel-frame, and in the combination, with a reel or rotatingdust-collector of this description, of mechanism whereby the'severalparts may be gradually lifted from their ordinary position and let fallto jar off the dust.

It further consists in the several devices and features of constructionhereinafter set forth, and pointed out in the claims.

In the drawings, Figure l is a general elevation of the apparatus. Fig.2 is a detached View of one of the movable sections of the reelframewith the cloth partly removed. Fig. 3 is a view of one of the movablesections of the reel partially lifted, and of another just after it hasfallen back into place, the former being in full end view and the latterin transverse vertical section; and Fig. 4 is a top view of one of themovable sections in proper relation to the head of the reel,and also inrelation to the lifting-guide.

H is a rectangular housing, having the inlet I, connecting with thepurifiers.

A is one of two reel-heads flush with the side of the housing at bothends,.and having the large central opening shown. The heads aresupported by the arms B from the shaft C, and are otherwise connected bythe longitudinal rails R R. (Seen in section in Fig. 3.)

Dis one of the segmental skeleton-frames or movable sections of thereel, provided with end pieces or heads N, and adapted to set into thegeneral reel-frame described between adjacent rails, R, and between theheads A. After inserting the frames D the cleats r are'applied andsecured to hold the frames in place. The sections D have a short radialmovement within the reel-heads A, and they are guided in this movementby the cleats M on the heads N, which run closely yet freely incorrespondingly radial grooves in the inner faces of the saidreel-heads. The heads Aare radially slotted at E E, and pins G protrudethrough these slots from the heads N of the segmental frames D.

At both ends of the reel are located guides J and J, supported from thehousing H or frame-work F in proximity to the heads A. The guides J areeccentric to the reel, and are placed, as shown, to successively raisethe movable segmental sectionsD as they approach the lowest point intheir revolution in the reel by engagement with the protruding pins Gr,and to let them fall at that point. The concentric guides J are placedto hold the move; ble sections 1) outward within the reel as they arecarried upward and over.

The several sectionsD are provided with a clothing, 0, (seen in Figs. 2,3, and 4,) tacked to the lower rails, c c, of the skeleton-frame, andcentrally drawn up into the frame by the rail 6, over which the clothingis laid without being fastened in any way. The rail 6 is provided withadjustable supports, and when it is moved outward by theadjustmentofsaid supports the clothing 0 will be equally strained oneach side of said beam, because, not being fastened to said beam, it canslide acrossit to equalize the strain on each side. pending-bolts f fare employed to support the rail 6 holes are out in the clothingsufficiently large to permit the bolts to pass without confining thecloth or preventing its free movement over said rails to equalize thestrain, as set forth. Practically, however, the difference in capacityof the cloth to stretch on the two sides of the rail will be verylittle, and the rail 6 will at all times be enabled to sway suffioientlyfar to equalize the strain. It is evident the rails may be supported andadjusted without using supports which require the cloth to beperforated. The ends of the cloth are also tacked to the inner faces ofthe heads N.

When sus- Loose strips of cloth are also tacked to the rails c c and tothe adjacent rails It, said strips being wide enough to allow of theradial movement of the frames D. The material of the clothing 0 0 is offlannel or, preferably, ofcoarse cotton goods-as, forcxample, the gradeknown as cheese-cloth. Said clothing so applied cuts off the exteriorspace about the reel and within the housing from the interior of thereel, except to the passage of air through the meshes of the cloth.

Beneath the reel is located a worm, W, in a longitudinal trough, L,preferably wider at the top than the distance between the rails R R.Said trough has the lateral wings L in proximity to the rails R, eachwing being wider than the distance between adjacent rails. The rails areprovided with longitudinal closing-strips s, which brush upon the wingsL, and thereby out 01f the trough L from the general space about thereel within the housmg.

The operation of the machine so constructed is obvious. The reel isslowly rotated in the direction of the arrow, Fig. 1. The clothing 0 ofthe several movable sections D of the reel, except that of, say, threesections at the bottom, is exposed to the blast from the puriiier withinthe housing H, and, finding escape only through central openingsinthereel-heads A, the air is forced through the clothing 0 and depositsits dust on its outer surface. As the reel turns the sections D aresuccessively lifted by the eccentric guides J, and are suddenly let fallover the trough L. Said sectionsD in falling strike and are stopped bythe rails r, the effect of which is to jar off the dust previouslyaccumulated on its clothing 0. The trough being cut off from the blastby the closing-strips 8 bearing on the broad wings L of the trough, saidtrough is a stil1-air space, in which the dust detached falls andsettles. It is carried out by the worm-conveyer W.

The reel may be advantageously run from the worm-shaft, the two beingconnected by suitable gearing. I have found that in a sixfoot reel thespeed should be about one turn in two minutes, making a relative speedbetween the worm and reel shafts of, say,eighty to one, giving fortyrevolutions per minute to the worm. A reel of the diameter mentioned andtwelve feet long is adapted to take the blast and collect the dust fromtwelve to twenty purifiers.

It is plain that the reel may have its axis vertical, and that thesections D may have a vertical movement. In that case said sections Dwill be without heads on their lower ends, and they should be shorterthan the distance between the reel-heads A. Slack clothing, 0, should beapplied at both ends of the sections D, connecting their ends with thereel-heads. Astationary guide corresponding with J placed beneath thereelwill serve to raise the sections D successively, and the guide Jwill be dispensed with.

For a single purifier the collector-reel will be about two feet indiameter, and may be located on the purifier. Employing the verticalreel the conveyer may be dispensed with and a spout used leading fromthe still-air space, into which the dust is deposited from thecollector-cloth 0.

Having thus described my invention, I claim- 1. The combination of adust-collecting reel having the cloth-bearing parts constructed inseparately-movable sections, and mechanism, substantially asdescribed,for moving said sections successively as the reel is rotated.

2. The combination of the following elements, namely: cloth-bearingparts made in sections movableindependently of each other. a rotatoryreel for supporting and carrying said cloth-bearing parts, a housingwhich directs the dust-laden air to the cloth or cloths, mechanism,substantially as described, for successively operating the movablecloth-bearing seetious to detach the dust, and a still-air chamber,substantially as set forth.

3. The series of cloth-bearing sections or frames adapted to rotatearound a common axis, and to move independently of each other toward andfrom said axis, in combination with the filtering-cloths respectivelyattached to said sections or frames, and arranged to formfiltering-chambers, which are open at their outer sides for the escapeof dust, substantially as set forth.

4. In combination with the separately-movable sections of the rotatoryreel, a liftingguide whereby the sections may be successive- 1y raisedand dropped, substantially as set forth.

5. In combination with a rotatory dnstcollectin g reel havingseparately-movable sections mounted therein, the guides J, concentricwith said reel, and the eccentric guides J, adapted to control andoperate the movable sections, substantially as set forth.

6. The combination of the separate rotatory cloth-hearin g sections orframes provided with the pins G and with the guides M, which hold thesections in proper positions radially, the reel having ways to receivethe guides M, and the stationary guides J and J, substantially as setforth.

7. In a dust-collector, a series of chambers, each of which is movableindependently, and has two of its sides covered with filtering-cloth,and has an open side through which dust-laden air is first admitted andthe dust is afterward discharged, in combination with supporting andoperating mechanism for each of said chambers, adapted to support it inposition to receive dust-laden air-currents, and to move it to anotherposition and adjust it independently of the others to remove the dust,substantially as set forth.

8. In a dust-collector, the combination, substantially as set forth, ofthe following elements, namely: a rotatory supporting-reel, a series ofclotlrbearing frames mounted sepa rately and loosely in said reel, aseries of separate filter-cloths attached to the separate frames, and aseries of tension-adjusting devices respectively attached to theseparate frames.

9. In a dust-collector, two or more separately movable cloth-bearin gframes, the separate tight filtering-cloths stretched upon said framesrespectively a housing surroundingthe frames and adapted to direct acurrent of dustladen air through the filtercloths, and the separateflexible cloths arranged to prevent the continuous air-current frominterfering with the proper discharge of the dust while the frames arebeing moved independently of each I 5 other, substantially as set forth.

In testimony that I claim the foregoing as my invention, I affix mysignature in presence of two witnesses.

NOAH W. HOLT.

Witnesses:

M. E. DAYTON, J ESSE Cox, Jr.

